Entanglement in optical parametric down-conversion with losses and noise

被引：8

作者：

Perina, Jan ^{[1
,2
,3
]}

Krepelka, Jaromir ^{[2
,3
]}

机构：

[1] Palacky Univ, Dept Opt, Olomouc 77207, Czech Republic

[2] Palacky Univ, Joint Lab Opt, Olomouc 77207, Czech Republic

[3] Acad Sci Czech Republic, Inst Phys, Olomouc 77207, Czech Republic

来源：

OPTICS COMMUNICATIONS | 2009年 / 282卷 / 19期

关键词：

Quantum measurement; Parametric down-conversion; Nonclassical light; CONTINUOUS VARIABLE SYSTEMS; CRITERION;

D O I：

10.1016/j.optcom.2009.06.032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that radiation generated in optical parametric down-conversion with losses and noise is entangled for all times if the coupling coefficient is higher than half of damping constant and the product of damping constant and mean number of noise photons. For the process stimulated by means of chaotic light there is a saturable bound of its intensity for the generation of nonclassical light. Otherwise the quantum behaviour and entanglement are fully reduced. Under some restrictions for noise nonclassical light can also be generated at and below the threshold. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3918 / 3923

页数：6

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